Knee support



FIG. 1 is a front view of a knee support according to one embodiment of the claimed design;

FIG. 2 is a first side view thereof;

FIG. 3 is a second side view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a first side in a position of use view thereof;

FIG. 6 is a front view in a position of use view thereof;

FIG. 7 is a second side in a position of use view thereof; and,

FIG. 8 is a rear view in a position of use view thereof.

The broken lines showing portions of a human leg are for the purpose of depicting environment and form no part of the claim. The broken lines on the knee support depict claimed stitching. 

CLAIM The ornamental design for a knee support, as shown and described. 